Strider's ending is a reference to that of the ending in his own game ("Strider")
Jin's ending is a reference to Gawaine's ending in "Cyberbots - Fullmetal Madness" (but with Jin taking the place of Gawaine, Onslaught taking the place of the Final Weapon of Destruction, Jin's headband taking the place of Gawaine's sword and Ryu taking the place of Jin).
Megaman's ending is a reference to what happens in his own games ("Mega Man - The Power Battle") when he beats a boss.
Captain Commando's ending is a reference to the ending in his own game ("Captain Commando").

Rumors exist for the reason War Machine was in the roster instead of Iron Man (although Hyper-Armor War Machine in the game had similar moves with Iron Man). The most popular reason being that Capcom, at the time, did not have the rights to use the Iron Man character.

The game background is mainly inspired by the famous comic saga called Onslaught, published in 1996. As in the comic books, Onslaught appears under his two main forms (after defeating the first one, he reveals its ultimate appearance).

Shirley Burton holds the official record for this game with 1119300 points.

Suleputer released a limited-edition soundtrack album for this game (Marvel Vs. Capcom OST - CPCA-1005) on March 21, 1998.

Michael Jackson used to own this game. It was sold at the official Michael Jackson Auction on April 24, 2009.

 Play As Roll-chan (-chan is a ''suffix for familiar 'female' person'') : At the character selection screen, highlight Zanglief and press Left(x2), Down(x2), Right(x2), Down(x2), Left(x2), Up, Right, Up(x2), Right(x2). Roll-chan will appear to the right of Megaman. Her moves are the same as Megaman.

 Play As Carnage (looks like a bloody Venom) : At the character selection screen, higlight Chun Li and press Right, Down(x4), Left, Up(x4), Right(x2), Down(x2), Left(x2), Down(x2), Right(x2), Up(x4), Left(x2), Up. High-speed Venom will appear above Chun-Li. He got the same moves as Venom but can do them very quickly.

 Change Character Lineup : Press all three Punch buttons at the 'vs.' screen to change the lineup (second chosen character is now first up). You can repeat this code again to reset the lineup.

 Continue Attacking : Press Start immediately after winning the match to move almost everywhere and have the ability to continue hitting the defeated character, even with super moves.

 Use Opponent's Helper : Defeat your opponent's helper in a single player game. Then, hold LK+MK+HK at the screen that displays the name of the character that won until the next match. If done correctly, your helper in the last match will be from your previous opponent's team.

 Name Changes : Enter --- as a name to have the game change it to 'SIN'. Enter AAA as a name to have the game change it to 'CAP'. Enter MMM as a name to have the game change it to 'MOT'.

 Fight Hidden Characters : In every case, you cannot lose a character. You can give up first attacks and have opponents join in, unlike what other sources tell you. A Super Finish is defined as either a Hyper Combo Finish, a Crossover Combination (or Variable Combination) Finish, or a Duo Team Attack (or Variable Cross) Finish.
1) To fight the team of Orange Hulk and Wolverine, get 3 Super Finishes.
2) To fight the team of Hyper-Armor War Machine and Captain America, get 5 Super Finishes, two of which must be Duo Team Attack Finishes.
3) To fight the team of Carnage and Spider-Man, get 6 Super Finishes, four of which must be Duo Finishes and finish six rounds under a certain amount of time.
4) To fight Lilith-Style Morrigan and Chun-Li, get 3 Super Finishes and drain your helper stocks in two matches.
5) To fight Roll and Megaman, get 5 Super Finishes, 2 of which are Duo Finishes and drain your helper stocks in six matches.
6) To fight Shadow Lady and Jin, get 6 Super Finishes, 4 of which are Duo finishes, drain your helper stocks in six matches and finish six matches under a certain amount of time.